21687770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 43441272

約数和(自身を除く): 21753502

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 130, 169, 205, 313, 338, 410, 533, 626, 845, 1066, 1565, 1690, 2665, 3130, 4069, 5330, 6929, 8138, 12833, 13858, 20345, 25666, 34645, 40690, 52897, 64165, 69290, 105794, 128330, 166829, 264485, 333658, 528970, 834145, 1668290, 2168777, 4337554, 10843885, 21687770]

約数ペア:

[(1, 21687770), (2, 10843885), (5, 4337554), (10, 2168777), (13, 1668290), (26, 834145), (41, 528970), (65, 333658), (82, 264485), (130, 166829), (169, 128330), (205, 105794), (313, 69290), (338, 64165), (410, 52897), (533, 40690), (626, 34645), (845, 25666), (1066, 20345), (1565, 13858), (1690, 12833), (2665, 8138), (3130, 6929), (4069, 5330)]